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CQ-TV 185 Magazine

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CQ-TV 185 Magazine Contents Contents............................................................................................................................................................ 1 Committee Contacts......................................................................................................................................... 2 Editorial ............................................................................................................................................................ 3 An Introduction to Test Card ‘M’................................................................................................................... 4 ATV Contest Records...................................................................................................................................... 6 CQ-TV Commercial advertising rates............................................................................................................ 7 Sales of the Century......................................................................................................................................... 8 TV on the Air .................................................................................................................................................10 12GHz Prescaler ............................................................................................................................................11 Experimenting with Video - part 2 ...............................................................................................................14 Simple TV Repeater Ident and Controller....................................................................................................19 Recreating the Cambridge Studio.................................................................................................................20 A tribute to Barry Keedy, G6LIC .................................................................................................................21 Tuneable TX for 23 and 13cm......................................................................................................................22 Deadline..........................................................................................................................................................28 Satellite TV News..........................................................................................................................................30 Micro transmitters..........................................................................................................................................32 Digital Terrestrial TV Arrives in the UK .....................................................................................................33 BATC Publications........................................................................................................................................35 Members’ Services ........................................................................................................................................36 The Empire Strikes Back! .............................................................................................................................39 Oscillators Using Logic Gates ......................................................................................................................42 Shuttleworth 99..............................................................................................................................................44 Photo Gallery..................................................................................................................................................45 Accuracy of Recovered H. P. 478A Thermistor Power Sensing Units......................................................47 Circuit Notebook No. 66 ...............................................................................................................................48 BBS Closure...................................................................................................................................................48 TELETEXT Pattern Generator Improvements............................................................................................49 Digital-ATV - today and tomorrow..............................................................................................................51 Historical Achievement for Amateur Radio and the Mir Space Station!...................................................53 Post and News................................................................................................................................................54 Members adverts............................................................................................................................................55 Index of Advertisers.......................................................................................................................................56 Edited by Ian Pawson, circuits drawn by Allan Robinson, proof read by Peter Delaney. All rights reserved, all wrongs denied. Legal Niceties E&OE. Whilst every care is taken in the production of this publication, the editor accepts no legal responsibility for the advice, data and opinions expressed. The BATC neither endorses nor is it responsible for the content of advertisements or the activities of those advertisers. No guarantee of accuracy is implied or given for the material herein. The BATC expressly disclaims all liability to any person in respect of anything and in respect of the consequences of anything done or omitted to be done wholly or partly in reliance upon the whole or any part of this magazine. The contents of this publication are covered by international copyright and must not be reproduced without permission, although an exception is made for not-for-profit publications (only) wishing to reprint short extracts or single articles and then only if acknowledgement is given to CQ-TV. Apart from any fair dealing for the purposes of published review, private study or research permitted under applicable copyright legislation, no part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopy, recording or otherwise, without the prior permission of the publisher. All copyrights and trademarks mentioned in this publication are acknowledged and no infringement of the intellectual copyright of others is intended. Printed in Great Britain. Copyright © 1999 by the BATC and contributors. Notice to Contributors Authors are alone responsible for the content of their articles, including factual and legal accuracy, and opinions expressed by them may not reflect the editorial stance of the publication. Material submitted to CQ-TV should not infringe the copyright of other writers or bodies. Articles remain the copyright of their authors and following publication in CQ-TV, they may also appear on the BATC's web site and CD-ROMs, also in other not-for-profit amateur publications. Contributions are accepted for publication on this basis alone. © 1999 by the BATC CQ-TV 185 Page 1 Committee Contacts BATC Chairman: Trevor Brown G8CJS Club affairs, Video tape library, Technical queries, especially relating to handbook projects. 14 Stairfoot Close, Adel, Leeds, LS16 8JR. Tel: 01132 670115. E-mail: [email protected] BATC General Secretary: Paul Marshall G8MJW General club correspondence and business. Library queries relating to the borrowing or donation of written material. Fern House, Church Road, Harby, Notts., NG23 7ED. Tel: 01522 703348. Email [email protected] BATC Hon. Treasurer: Brian Summers G8CQS Enquiries regarding club finances, Donations, and constitutional enquiries. 9 Prior Croft Close, Camberley, Surrey, GU15 1DE. Tel: 01276 677879, Mobile 0850 014892 Email: [email protected] CQ-TV Magazine: Editor Ian Pawson Anything for publication in CQ-TV, Articles, Review items, Letters to the editor, and other material except as below. 14 Lilac Avenue, Leicester, LE5 1FN, England. Tel: 0116 276 9425, Email: [email protected] Photographs for the CQ-TV covers: - Please send any photographs by post, electronic images by email, to the editor at the above addresses. TV on the Air: - Graham Hankins G8EMX, 11 Cottesbrook Road, Acocks Green, Birmingham, B27 6LE. Tel: 0121 707 4337 Satellite TV News: - Paul Holland G3TZO, Chatterton, Chapel Lane, Threapwood, Nr. Malpas, Cheshire, SY14 7AX. Tel: 01948 770429, Email: [email protected] CQ-TV Advertising Manager: - Chris Smith G1FEF 25 Dando Close, Wollaston, Northants, NN29 7QB. Tel: 01933 666979 Fax: 01933 666972. Email: [email protected] CQ-TV Awards: - Bob Webb G8VBA, 78 Station Road, Rolleston on Dove, Burton on Trent, Staffs., DE13 9AB. Tel: 01283 814582 Exhibitions Mike Wooding G6IQM, 5 Ware Orchard, Barby, Nr. Rugby, CV33 8UF. Tel: 01788 890365, Fax: 01788 891883, Mobile: 0860 857434 Email: [email protected] Club Sales Members Services: - PCB’s, components, camera tubes, accessories, etc. (NOT PUBLICATIONS). Peter Delaney G8KZG, 6 East View Close, Wargrave, Berkshire, RG10 8BJ. Tel: 0118 940 3121 Publications: - Handbooks, Back copies CQ-TV, and anything related to the supply of BATC publications. Paul Marshall, Fern House, Church Road, Harby, Notts., NG23 7ED, England. E-mail: [email protected] Membership Anything to do with membership, including new applications, queries about new and existing membership, non- receipt of
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